Oxygen-permeable hard contact lens

Details Oxygen-permeable hard contact lens Oxygen-permeable hard contact lens

G - Physics

02

C

18/106, 88/40, 4

G02C 7/04 (2006.01) B29D 11/00 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1205943

ABSTRACT OF THE DISCLOSURE An oxygen-permeable hard contact lens is disclosed which is produced by polymerizing in a mold a composition composed of 30 to 50% by weight of an alkyl (meth)- acrylate, 10 to 40% by weight of a fluoxine-containing monomer, 10 to 35% by weight of a silicone (meth)- acrylate, 5 to 15% by weight of an unsaturated carboxylic acid and 0.1 to 15% by weight of a di- or tri(meth)- acrylate of a dihydric or higher hydric alchol by raising the temperature continuously or stepwise from about 40° to about 100°C and processing the resulting polymer into a lens shape by ordinary mechanical processing and polishing. The resultant lens is excellent in stain resistance, scratch resistance and hydrophilicity.

433260

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